JavaFX GridPane create chess board

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.GridPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class Main extends Application {
  @Override/*from  w  w w .jav a  2 s . com*/
  public void start(Stage primaryStage) {
    // Create a GridPane
    GridPane pane = new GridPane();

    // Create 64 rectangles and add to pane
    int count = 0;
    double s = 100; // side of rectangle
    for (int i = 0; i < 8; i++) {
      count++;
      for (int j = 0; j < 8; j++) {
        Rectangle r = new Rectangle(s, s, s, s);
        if (count % 2 == 0)
          r.setFill(Color.WHITE);
        pane.add(r, j, i);
        count++;
      }
    }

    // Create a scene and place it in the stage
    Scene scene = new Scene(pane);
    primaryStage.setTitle("java2s.com");
    primaryStage.setScene(scene); // Place in scene in the stage
    primaryStage.show();
    ;
  }
}